<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                  {{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? 'dbtop' : '', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      type="success"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
              {{ scope.row }}
           </pre -->
            >
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <!-- 编辑按钮 -->
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <!-- 删除按钮 -->
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeRoleById(scope.row.id)"
              >删除</el-button
            >
            <!-- 分配角色按钮 -->
            <el-tooltip effect="dark" content="分配权限" placement="top-start">
              <el-button
                type="warning"
                icon="el-icon-setting"
                size="mini"
                @click="showSetRightDialog(scope.row)"
                >分配权限</el-button
              >
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限对话框 -->

    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        node-key="id"
        show-checkbox
        default-expand-all
        :default-checked-keys="defKeys"
        :data="rightslist"
        :props="treeProps"
        ref="treeRef"
      ></el-tree>

      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClose"
    >
      <!-- 内容主题区域 -->
      <el-form
        ref="addFormRef"
        :model="addForm"
        :rules="addFormRules"
        label-width="70px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.rolename"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="rolsDesc">
          <el-input v-model="addForm.roledesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改角色对话框 -->
    <el-dialog
      title="修改角色"
      :visible.sync="editDialogVisible"
      width="50%"
      :before-close="editDialogClosed"
      :rules="editFormRules"
    >
      <!-- 内容主题区域 -->
      <el-form ref="editFormRef" :model="editForm" label-width="70px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.rolename"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="rolsDesc">
          <el-input v-model="editForm.roledesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleinfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制对话框的显示与隐藏
      addDialogVisible: false,
      addForm: {
        rolename: "",
        roledesc: ""
      },
      addFormRules: {
        rolename: [
          { required: true, message: "请输入角色名称", trigger: "blur" }
        ],
        roledesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" }
        ]
      },
      // 控制修改用户对话框的显示与隐藏
      editDialogVisible: false,
      // 查询到的用户信息对象
      editForm: {},
      editFormRules: {
        rolename: [
          { required: true, message: "请输入角色名称", trigger: "blur" }
        ],
        roledesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" }
        ]
      },
      // 控制对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件属性绑定对象
      treeProps: {
        label: "authName",
        children: "children"
      },
      // 默认选中的节点id值
      defKeys: [],
      // 当前分配权限角色id
      roleId: ""
    };
  },
  created() {
    this.getRoleList();
  },
  methods: {
    // 获取所有角色列表
    async getRoleList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.rolelist = res.data;
      console.log(this.rolelist);
    },
    // 监听添加用户对话框关闭的事件
    addDialogClose() {
      this.$refs.addFormRef.resetFields();
    },
    // 点击按钮 添加新用户
    addRole() {
      this.$refs.addFormRef.validate(async valid => {
        // console.log(valid);
        if (!valid) return;
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post("roles", this.addForm);

        if (res.meta.status != 200) {
          this.$message.error("添加角色失败");
        }

        this.$message.success("添加角色成功");
        this.addDialogVisible = false;
        this.getRoleList;
      });
    },
    // 展示用户编辑的对话框
    async showEditDialog(id) {
      // console.log(id);
      const { data: res } = await this.$http.get("roles/" + id);

      if (res.meta.status !== 200) {
        return this.$message.error("查询用户信息失败");
      }

      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    // 监听用户修改对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    // 修改用户信息并提交
    editRoleinfo() {
      this.$refs.editFormRef.validate(valid => {
        // console.log(valid);
        if (!valid) return;
        // 发起修改用户信息的数据请求
      });
    },
    // 根据id删除对应的用户信息
    async removeRoleById(id) {
      // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm(
        "此操作将永久删除该用户, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
        // 如果用户取消删除则返回为字符串cancel
      ).catch(err => err);
      // 如果用户确认删除则返回值为confirm
      // console.log(confirmResult);

      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }
      const { data: res } = await this.$http.delete("roles/" + id);

      if (res.meta.status !== 200) {
        return this.$message.error("删除用户失败");
      }

      this.$message.success("删除用户成功");
      this.getRoleList;
    },
    // 根据id删除对应权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);

      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除");
      }

      const { data: res } = await this.$http.delete(`roles/${role.id}/
      rights/${rightId}`);

      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败");
      }
      // this.getRoleList();  此时不建议调用函数  因为会发生页面的完整渲染
      role.children = res.data;
    },
    // 展示分配权限对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      // 获取所有权限的数据
      const { data: res } = await this.$http.get("rights/tree");
      this.setRightDialogVisible = true;

      if (res.meta.status !== 200) {
        return this.$message.error("获取权限数据失败");
      }

      // 把获取到的数据保存到data中
      this.rightslist = res.data;

      console.log(this.rightslist);

      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys);
      this.setRightDialogVisible = true;
    },
    // 通过递归形式 获取角色下所有三级权限的id ,并保存到defKey数组中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包括childre属性 则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }

      node.children.forEach(item => this.getLeafKeys(item, arr));
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = [];
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),

        ...this.$refs.treeRef.getHalfCheckedKeys()
      ];
      // console.log(keys);

      const idStr = keys.join(",");

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/
      rights`,
        { rids: idStr }
      );
      console.log(res);

      if (res.meta.status !== 200) {
        return this.$message.error("分配权限失败");
      }

      this.$message.success("分配权限成功");

      this.getRolesList();
      this.setRightDialogVisible = false;
    }
  }
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.dbtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
